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On 10/8/2010 6:04 PM, Matt Lafferty wrote:
<blockquote cite="mid:6ABFB34960754ABB8F86129A9A1FAB76@GILLIGONE"
type="cite">
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<div><span class="078505600-09102010"><font size="2" face="Arial">Hola
Wrenches,</font></span></div>
<div><span class="078505600-09102010"></span> </div>
<div><span class="078505600-09102010"><font size="2" face="Arial">Does
anybody know off the top of their head if the <em>"5-minute-wait-to-interconnect"</em>
function is tested on 100% of inverters produced? <em>(i.e.
every single inverter is tested with AC & DC within
the start parameters of the unit for at least 5 minutes)</em></font></span></div>
<div><span class="078505600-09102010"></span> </div>
<div><span class="078505600-09102010"><font size="2" face="Arial">Thanks!</font></span></div>
<div><span class="078505600-09102010"></span> </div>
<div><span class="078505600-09102010"><font size="2" face="Arial">Matt
Lafferty</font></span></div>
</blockquote>
<br>
Good question. I bet it's not 100% tested because if the software
does not<br>
change, then they may just not wait the extra 5 minutes in order to
save money on testing.<br>
Or, maybe they do a random sampling for this test.<br>
<br>
Theoretically, it shouldn't matter as long as the software does not
change<br>
and the hardware is tested enough in other ways, like, timers and
clocks etc.<br>
<br>
<br>
BTW, Nowadays, there are two options for manufacturers of grid
interactive inverters....<br>
And the UL spec has gotten more stringent.<br>
<br>
One option is that you have to have the code (software) blessed
by the NRTL in a separate<br>
process (another UL specification, (UL 1998 –Software in
Programmable Components")<br>
<br>
OR, if they don't go for that option, then if software changes need
to be done to the<br>
inverter, the inverter must (technically) go through the UL1741
listing process all over<br>
again.<br>
<br>
boB<br>
<br>
<br>
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